Home / 1,401.45-2,101.77-427.34

Finding the Fourth Proportional to 1,401.45, 2,101.77 and 427.34

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Solution

The fourth proportional to 1,401.45, 2,101.77 and 427.34 is: 640.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.45 : 2,101.77 = 427.34 : x
  2. Step 2: Convert to fraction form
    1,401.45/2,101.77 = 427.34/x
  3. Step 3: Cross multiply
    1,401.45x = 2,101.77 × 427.34
  4. Step 4: Simplify right side
    1,401.45x = 898,159.88
  5. Step 5: Solve for x
    x = 898,159.88/1,401.45
  6. Step 6: Final answer
    x = 640.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.